Discovery ID

'S1/E5 - Episode 5'. Customs officers have to climb a perilous 30-metre ladder to search a massive vessel. And, officers uncover over 100 cigarette packs hidden in a car.

'S1/E5 - Episode 5'. In Dorohusk, customs officers conduct a detailed search of a busy train. Meanwhile, a sniffer dog helps to thwart two cigarette smugglers in Korczowa.

'S4/E8 - Paging Dr. Essa'. Yazeed and Rosemarie Essa, lead a happy life. However, one day Rosemarie slumps over behind the wheel and crashes, apparently from a heart attack. Was foul play involved?

'S4/E9 - Murder On Route 91'. Just before midnight, Nuzzio and his wife pull off Route 91. The couple is worried about the menacing men that are following them.

'S5/E4 - Blood In The Streets'. John profiles Luis Montes, accused of murdering his on-again-off-again girlfriend. Callahan shines a light on two victims of gun violence in Chicago.

'S5/E5 - Masked Murderer'. John and Callahan hunt down accused killer John Galvao-Sahb, and Dublas Gonzalez, an alleged perpetrator of a twisted case of child sexual abuse.

'S1/E5 - Failure To Remember'. Penny Brummer is accused of murdering her ex-girlfriend's best friend. But Penny had been so drunk she was in a blackout state. Can she prove her innocence?

'S2/E11 - Sender: Unknown'. 12-year-old Justin Bloxom is addicted to MySpace and attached to his cell phone. One night, Justin sneaks out to meet a new friend, but never returns.

'S2/E12 - Only Way Out'. Teenagers Robert and Grace meet online and fall in love. When her father nixes an attempt to meet in the real world, the pair hatch a dark plot online.

'S1/E6 - Episode 6'. In Korczowa, a scanner alerts customs officers to a suspicious van. Plus, a sniffer dog helps to uncover contraband and unusual items hidden in a coach.

'S2/E14 - Road Trip Killers'. In a quiet Mississippi town, a civil war buff vanishes into thin air. Months later, a skull is found buried at a truck stop, and another mystery unfolds.

'S2/E16 - Out Of The Ashes'. A lakeside community in rural Minnesota is sent reeling when a 19-year-old woman disappears. Police turn to a solar physicist to identify a killer with a burning desire.

'S2/E2 - The Man In The Mirror'. When two young men are shot dead, detectives turn to digital forensics, hoping hidden data buried in the victims' cell phones will help track down the killer.

'S2/E4 - Digital Crumbs'. When family man Ricky Saxton is found murdered, Investigators turn to a forensic data specialist at the FBI to help locate a missing piece of the puzzle.

'S2/E2 - Catch Me If You Can'. In New Mexico, police chase a shooter who guns down an unarmed man. In Florida, police close in on an armed robber from the ground and air.

'S2/E3 - Where's Alissa'. In Louisiana, police use social media to track down a killer. Investigators use video evidence to solve a puzzle and catch a killer before he flees the country.

'S2/E6 - Killer Identity'. When a young mother of three vanishes on Mother's Day, police race to find her. The search grips the entire community, but no one is ready for what it will uncover.

'S2/E7 - Connections To Murder'. An unknown killer murders a couple. DNA links an unexpected suspect to the crime, and investigators must rely on recorded jailhouse phone calls for evidence.

'S2/E4 - Puzzle In Pieces'. In New York a young man's disrespectful behaviour angers his friends. They plot to teach him a lesson, but things turn dark and spark a complex murder mystery.

'S12/E2 - A Mother Knows'. A soldier dies in a brutal attack during a night out with her unit. Police determine if a secret fear she told her mum is the motive for her murder.

'S9/E7 - Love, Lies, And Lust'. In 2018, police search a backyard in Florida for a body after a once-idyllic marriage sours and turns vengeful, filled with lies and affairs.

'S2/E2 - City Under Fire'. The East Coast experiences the first major terrorist attack since 9/11 - the FBI races against time to track down the bomber and save thousands.

'S6/E9 - Murder In Progress'. In Georgia, officers find a car in a ditch with no driver in sight. A suspect seems cooperative but when police sense foul play, he goes on the run.